Cell to mat conversion
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Hi,
I have a cell array and need to convert to array.
a = {[100, 200, 300, 400, 500], [1000, 2000, 3000, 4000, 5000], [1100,1200, 1300, 1400, 1500]};
for each set b = a(1);
I need array data like,
b = [100, 200, 300, 400, 500];
i tired cell to mat, its not working.
采纳的回答
Bjorn Gustavsson
2021-2-24
If you want to extract the content of one cell simply do:
b = a{1};
If you want to merge a couple of cells into an array or matrix you can do:
B2 = cell2mat(a([1 3]));
B3 = cell2mat(a([1,3])');
HTH
7 个评论
Chandan Prakash
2021-2-24
Bjorn Gustavsson
2021-2-24
Try my suggestion before re-asking for what my solution provides:
>> a = {[100, 200, 300, 400, 500], [1000, 2000, 3000, 4000, 5000], [1100,1200, 1300, 1400, 1500]}
a =
1x3 cell array
{1x5 double} {1x5 double} {1x5 double}
>> b = a{1}
b =
100 200 300 400 500
The values in b are now the contents of the first cell, which were identical to your requested array of [100, 200, 300, 400, 500].
If that doesn't solve your question you'll have to be more specific.
Chandan Prakash
2021-2-24
Bjorn Gustavsson
2021-2-24
That, then, is because your data is not in the format you indicated. That must, and now you're forcing me to guess, be because the contents in cell 1 in your real array a is a string? If that is the case you have to investigate yourself, since we are not privy to that information. If that is the case you will have to convert the string to an array of numbers. This is a task completely different from extracting the information in a cell, but you can do something like:
b_string = '100 200 300 400 500';
b = str2num(b_string)
HTH
Chandan Prakash
2021-2-24
Bjorn Gustavsson
2021-2-24
You're welcome.
The reason was that you confused the two different indexings on cell-arrays, and then the data-format in the cell. When runing into these problems look at the data-type of the intermediate variables - that should reveal some of the reasons for the results or errors you get - for this I typically use (in your example):
whos b
That will tell the size and data-type of the variable b.
Chandan Prakash
2021-2-24
更多回答（1 个）
iwant = reshape(cell2mat(a),[],length(a))' ;
iwant(1,:)
3 个评论
Chandan Prakash
2021-2-24
a = {[100, 200, 300, 400, 500], [1000, 2000, 3000, 4000, 5000], [1100,1200, 1300, 1400, 1500]};
iwant = reshape(cell2mat(a),[],length(a))' ;
iwant(1,:)
Chandan Prakash
2021-2-24
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